Question

Diameter=42 cm what is the circumference

Answer 1

Answer:

Step-by-step explanation:

Diameter = 42cm

Radius = 21cm

Circumference of circle =2*radius*22/7 = 2*21*22/7 = 6*22 = 132cm is your answer

Answer 2

Answer: 132

Step-by-step explanation:

we know that

circumference=2*$\pi$*r    ................eq 1

and, radius=diameter/2

therefore,   radius=42/2=21cm

and $\pi$=22/7

putting these values in eq 1

we get,      2*22/7*21=132cm